Shipping package system for fragile panels

ABSTRACT

A product vulnerable to damage during shipping, such as an automobile windshield glass, for example, is mounted on a support pad and fixed onto the pad by wrapping a stretch wrapping film around the combination of the pad and glass. The borders of the pad extend beyond the borders of the glass so the package containing the glass can be stood on edge, but the edge of the glass is spaced away from the surface on which the package is stood. Thus the glass, secured to the pad, is suspended away from that surface. Multiple packages can be packed into a shipping container and the loaded container can be lifted and transported by a lift truck with lifting forks received in passageways formed in the container by notches in the bottom edges of the support pads. The pads and containers are made of die-cut. corrugated fiberboard material although other material might also be used in the practice of the invention.

BACKGROUND OF THE INVENTION

The present invention relates generally to packaging for shipment of products whose configurations have length and width that are large relative to depth, and more particularly to packaging such products which are made of materials or have construction features which are easy to break or otherwise damage in shipping operations.

Current bulk packaging of windshields for the automotive after-market trade is predominantly configured to hold twenty-five or more windshields. Such packaging involves construction of wooden frame with corrugated fiberboard attached around the framing, along with several other packaging components to protect various fragile contact points of the individual windshields. A considerable amount of labor is required to configure the packaging for use by the manufacturer of the glass. The containers are required to be “pre-erected” and they present difficulties in the shipping and storage of empty containers.

SUMMARY OF THE INVENTION

One aspect of the invention provides means and method for protection of products individually during storage and shipment.

Another aspect is facilitating the standing of individual product containing packages on edge on a floor, a table, a “bulk pack” container bottom, or other supporting surface, but suspending the product spaced away from the supporting surface.

Another aspect of the invention provides a support pad shaped to facilitate placement of the product to be shipped, within the perimeter of the pad, and stretch wraps the product onto the pad with commercially available stretch film using the stretch and holding properties of the film and thereby secures the product in place on the pad within the perimeter of the pad.

Another aspect of the invention is that a single wrapped-product package can be placed in a container and shipped to a customer.

Another aspect is packaging a product so that a number of packages of individual products can be “collated” into a shipping container.

Another aspect of the invention is that shipping containers filled with a number of packages of individual products can be provided, using cohesive properties of stretch wrap film to add stability to such “bulk packs” without separators between the individual packages.

Another aspect of the invention is that a support pad and shipping container can be made of materials “Knocked down flat”, and stored flat until the product to be shipped is manufactured and ready to pack out. At that time the pad and container materials can be erected for packaging the product.

Another aspect of the invention is provision of holes in shipping containers for entry of forks of lift trucks enabling the lifting, transportation and storage of loaded containers without separate pallets.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front perspective view of a windshield package according to one embodiment of the present invention.

FIG. 2 is a rear perspective view of the package of FIG. 1.

FIG. 3 is a front view of a pattern for a two-tab corrugated fiberboard blank for a windshield suspension pad according to another embodiment of the invention.

FIG. 4 is a schematic diagram showing a windshield about to be installed on a fiberboard blank according to the pattern of FIG. 3.

FIG. 5 is a view showing the windshield installed on the blank.

FIG. 6 shows the tabs folded up over the bottom edge of the windshield.

FIG. 7 shows the windshield and pad wrapped with stretch wrap film suspending the windshield on the pad and thus forming a windshield package.

FIG. 8 shows a corrugated fiberboard blank for a shipping container bottom tray according to one aspect of the invention.

FIG. 9 shows the blank of FIG. 8 erected to form a bottom tray, and a similar blank erected to form a top tray or lid of the shipping container to be filled with the windshield packages.

FIG. 10 is a view of the back of a package suspending a windshield therein and being carried conveniently by a worker.

FIG. 11 is a top view of a plurality of such packages arranged in an X-shaped configuration in a container bottom tray.

FIG. 12 is a perspective view showing the packages in a shipping container ready for installation of the top.

FIG. 13 shows the container closed and strapped closed.

FIG. 14 is similar to FIG. 13 but with a portion broken out of the corner to show the pads mounted directly on the floor of the container and with the bottom notches in the pad oriented for access by the lifting forks of a lift truck.

FIG. 15 is a front perspective view of a cabinet door package prepared according to an embodiment of the present invention.

DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS

For the purposes of promoting an understanding of the principles of the invention, reference will now be made to the embodiments illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated device, and such further applications of the principles of the invention as illustrated therein being contemplated as would normally occur to one skilled in the art to which the invention relates.

Referring now to FIGS. 1 and 2, a package according to one embodiment of the present invention is shown. It includes a corrugated fiberboard pad 11 cut to provide three tabs 12 at the bottom edge 13 and which have been turned upward to produce notches 14. Similarly, three notches 16 have been provided in the upper edge 17. In these instances, instead of forming tabs at the notches, the material has been completely blanked out of the board.

A curved windshield 18 is mounted to the pad 11 and is secured to the pad by film stretch wrapped around the pad and the windshield as at 19. the wrapping material can be wrapped by machine or by hand, and the pattern can be random as long as there is control of location of the windshield on the pad so that the entire perimeter 21 of the windshield is well within the bottom and top edges 13 and 17 of the pad and the side edges 22 and 23 of the pad. The film wrapping through the notches and around the edge of the windshield at the top and around the tabs at the bottom is important. It is preferable that the wrapping from top to bottom is performed across the majority of the width of the windshield. While the wrapping from top to bottom notches can be parallel on either the front as shown in FIG. 1, or the back, it is preferable that there be continuous wrap from notches in the upper edge diagonally to notches in the lower edge on at least the front or the back and, preferably, on both front and back of the package. A combination of this angled wrapping with straight wrapping from top notch to bottom notch and from portions of the top edge other than notches, to portions of the bottom edge both notched and without notches, is shown on the backside of the pad in FIG. 2. So the stretch wrapping of the windshield is adequate to suspend the windshield on the pad with all features of the windshield edges well within the area defined by the perimeter of the pad. The upturned tabs 12 held in place by the wrapping may assist in supporting the weight of the windshield during the wrapping and subsequent handling and transportation.

Referring now to FIG. 3, there is shown a drawing pattern for a die-cut pad 26 of 275 pound double-walled corrugated fiberboard material. Dimensions in inches are shown as an example. In the resulting die-cut pad, the top edge 27 has two notches 28 punched completely out. The side edges 29 and 31 are straight. The bottom edge 32 is notched at four places to form two tabs 33 and 34 with light score lines such as 36 to facilitate folding them forward. A hand hole 35 is blanked out of the middle. The printed outline of the windshield to be suspended on this pad is printed on the pad as shown at 37, 38, 39 and 41. This outline provides appropriate guidelines for the placement location of the windshield on the pad for stretch wrapping. Various other ways for proper product placement can be used. Another example is die cuts to produces holes, marks or tabs for orientation points. Of course such cuts can be provided at the same time that the pad is cut from stock.

Referring now to FIG. 4, the blank 26 is shown ready for mounting the windshield 42 on it The windshield is placed on the pad as shown in FIG. 5, and the tabs 33 and 34 are turned upward and forward in the direction of arrows 43 so that they overlap the front face of the windshield at the bottom edge as shown in FIG. 6. The score lines such as 36 on the pad 26 assure that when the tabs are bent forward and upward the windshield will be properly located with its lower edge overlying the pattern drawn or otherwise placed on the front of the pad 26.

When the windshield has been positioned such that it matches the pattern of lines, the stretch wrap film 44 is stretch wrapped around the pad and the windshield, with the film being wrapped through notches 28 at the top and around and covering the tabs 33 and 34 at the bottom, securely locating the windshield on the pad. Stretch wrap is continued as needed or desired around the front of the windshield and the back of the pad. When the amount of stretch wrapping ahs been completed to provide the degree of attachment and protection desired, the wrap film can be cut, and the end portion of the film adhered to the portion already wrapped, using the benefit of the cohesive nature of the wrapping film. If desired, the amount of warp shown on the front of the windshield at FIG. 7, can be more than necessary to simply suspend the windshield securely on the pad, and/or can be spread out the whole width of the windshield, to serve additional useful purpose as will be described later herein.

Referring now to FIG. 8, a die-cut blank 46 of double wall. 275# corrugated fiberboard or any other appropriate strength material is shown for the bottom “tray” of a shipping container. It has the usual bottom panel 47 with sidewalls 48, end walls 51 and flaps 52 on the end walls. The sidewalls have holes punched at 53. This blank can be erected as shown in FIG. 9, gluing or otherwise securing the flaps 52 to the side walls in conventional fashion. A top 56 can be made according to the same form or pattern blank as for the bottom tray, but omitting holes 53, and made slightly larger than the bottom tray, to slide down on it in the direction of arrows 57 to close the shipper.

Prior to closing the shipper, it is filled with window packages such as described above with reference to FIGS. 3-7. After wrapping the window, the wrapped window package 45 (FIG. 7) can be picked up and conveniently carried by the worker standing at either the front of the wrapped windshield and pad, or at the rear, and inserting a hand in the hand hole 35 as shown in FIG. 10, and picking up and carrying the windshield to the shipper tray 46 and placing the windshield in the tray with the bottom edge 32 of the pad resting on the bottom 47 of the tray. Since the windshield is curved, the rapping with stretch wrap imparts a curve to the pad. Such curve is shown in FIGS. 1, 2, 11 and 12. Therefore, the windshields will be placed in the tray in an “X” configuration as shown in FIGS. 11 and 12. By placing them in this configuration, instead of nesting all windshield packages in one orientation, half of them are oriented in one direction and the other half in the other direction. Therefore the convex front surfaces of all of the packages face inwardly toward the center plane 61 (FIGS. 8 and 11) of the container. The two windshield packages 45L and 45R at the center of the container, could have their convex front faces in abutting relationship. Therefore, it may be desirable that the wrapping for these two packages be extra thick to prevent any left to right (FIG. 11) shifting of the packages. Alternatively, and more likely than extra wrapping on center packages, some packing material can be placed between these facing windshield packages 45L and 45R. An example is one double wall panel 50 of corrugated fiberboard. The rest of the packages nest. The side edges 29 and 31 of the pads are close enough to the end walls 51 of the tray that there is no shifting sideways of the windshields within the tray.

Bottom notches 14 were mentioned with reference to the embodiment of FIGS. 1 and 2. Similarly, there are the bottom notches 30 in the pads of the illustrations of the two-notch embodiment of the FIGS. 3-7 and 10-14. According to another feature of the invention mentioned with reference to FIG. 8, there are four holes 53 in the sidewall 48 of the bottom tray 46 of the container. As best shown in FIG. 14, the bottom edges 32 of the pads rest on the floor 47 of the tray 46. the top of each of the notches 30 is spaced above the tray bottom 47. The holes 53 are aligned with the notches in the pads, all of which are aligned in two rows 35 (FIG. 11) when the containers have been packed with the packages 45. The holes 53 provides access to the lifting forks 40 of a fork lift truck. Thus, it is possible to use the packed containers according to the present invention, without pallets, because the forks of the lift truck can enter the access holes 53 and pass through notches 30 under the windshields and lift the whole shipper and transport it as needed. The upturned tabs 34, and stretch wrapping around them, provide protection for the pads and the suspended windshield glasses. If further protection is desired to assure prevention of edge crush of the pads by lifting forks at notches 30, some tubes or downwardly opening channels made of corrugated fiberboard or other material can be placed from the access holes 53 in one tray wall and extend through the passageways formed by the bottom notches 30 of the pads to the access holes in the opposite wall of the tray. An example of such channel is shown in FIG. 12 where two such channels 55 are shown partially inserted into the two passageways 35 (FIG. 11) formed by the two notches 30 each, of all of the pads in a filled container bottom tray. This is a way that, if needed or desired, additional protection can be provided in the tops of the passageways formed by the notches 30 in all of the window packages from one of the walls 48 through the container to the other wall 48. After a container is filled, the lid 56 can be installed and can rest on the upper edges 27 of the suspension pads and strapped closed by poly strapping 64 in two places, running through the access holes 53, and under the pads through the notches 30. If desired to preclude any edge crush by the strapping 64, some tabs 66 of fiberboard or other material can be folded around the upper edges of the holes 53 as shown in FIG. 13. Similar protection can be provided at other locations such as 67.

Packaging according to the present invention may be done by performing the stretch wrapping by hand. But various stretch wrapping machines are known. Examples are referenced in U.S. Pat. Nos. 6,564,532 and 6,550,222, and the references cited therein. Another is the “Yellow Jacket 110” which is a horizontal stretch wrapping machine by Wiley Metal, of Marion Ind., U.S.A. So the product and pad can be stretch wrapped by machine, if desired.

The packaging of automotive window products individually and “collating” a number of the packages into a shipping container can have real advantages over conventional practices. It allows safer and easier handling of individual glass components, as the stretch wrapping can be extensive enough, if desired, to cover the entire perimeter of the glass and thereby preclude encounter of any edge of glass by a worker while loading the packages into a shipping container. Additionally, the cohesive properties of the stretch wrap film, as one package nests against another, can lend stability to the bulk packs of multiple packages, by virtually eliminating the tendency of windshields to “shingle”, i.e. slide out of the bottom of current conventional packaging. It can also reduce the incidence of damage in transit.

In the foregoing description, the illustrated embodiments show forwardly and upwardly turned bottom tabs on the pad. The weight and application of the product to the pad can have a bearing on whether it is desirable or necessary to sue tabs at the bottom or at the top (at the location of the notches 28) or both bottom and top, or not at all. If the glass or other product to be suspended to a pad according to the invention is relatively flat, it may be desirable to have notches in the side edges of the pad as well as in the top and bottom, and stretch wrap film around the product, not only in and through the notches in the top and bottom edges, but also in and through notches in the side edges.

It should be understood that the invention can be employed using suspension pad materials other than 350 pound, double walled corrugated fiberboard. It depends on the nature and weight of the product to be suspended. Since the space requirement of the suspended product is usually significantly greater in length and width, than in thickness, it is usually suspended such that the package will be packed on edge in the shipper. Therefore the fiberboard will be oriented with the flutes running vertically to provide the needed vertical column strength. It is conceivable that a pad with only one facing secured to the corrugated media, might be sufficient in some applications.

It is also conceivable that the pad be made of material other than corrugated fiberboard. A plastic or metal might also be used. Desirability and height of stacking containers in warehouses or vehicles, weight and nature of the packaged product, and other considerations could dictate features of pads made of other materials, to provide the necessary column or top-to-bottom stacking strength of the pad. For example, if plastic were used, it might be necessary to have a corrugated component. Another consideration is the condition of the surface of the pad material, which is contacted by the product to be suspended. It cannot be abrasive, if abrasion of the product portion in contact would be detrimental to the needed appearance or performance of the product. Otherwise, it may be necessary to stretch wrap portions of the pad before placing the product on the pad, so that the stretch wrap film will protect the pad-engaging portions of the product from abrasion, and then wrap the product onto the pad. Alternatively, a non-abrasive coating can be provided on the front of the pad where the product will contact it.

The thickness of the wrap film used depends on what is necessary to get a snug covering of the product on the pad. Where the product will be machine-wrapped onto the pad, film selected will be dictated largely by optimum effectiveness of performance of the wrapping machine.

If, instead of bulk shipping of ten to thirty or more packages, only one package is to be shipped, a simple container can be employed. If the product is curved, as for a windshield or backlight (back window), the corners may appear to be more vulnerable than inboard portions of the window. Dunnage can be placed in the container if desired so that the corners of the pad remain properly situated in the corners of the container. the corners of the glass, being well inboard from the corners of the container, are well protected. If desired, instead of adding dunnage, pad extension panels or “wings” 26W (FIG. 3) can be provided by scoring or creasing the pad at locations 29 and 31. This will allow the panels to be folded forward at a ninety-degree angle from the plane of the face of the pad and extend across the width or short dimension of the shipping container. The short dimension will be relatively small, as the container is containing only one product package. Therefore the extension panels locate the pad in the container not only side-to-side, but also front-to-rear and, with the back of the pad located against the back of the container, and corners of the product touching or near the front of the pad, the edges and corners of the product are kept away from the front of the container.

In the description above, the packaged product has been made of glass. The invention is useful for the packaging and shipping of a variety of other products, where the product is three dimensional but the x-axis and y-axis dimensions are significantly greater than the z-axis dimension. Frequently, for various reasons such as, for example, convenience is removal of a certain package from a group, or to avoid warp, it is preferred to pack, store and ship the products oriented on an edge, like books in a bookcase. In the above examples, the side-to-side (x-axis) and top-to-bottom (y-axis) dimensions are significantly greater for the curved windshield than is the maximum dimension on the front-to-back (z-axis) i.e. the distance between imaginary parallel planes, one of which touches the most forward point of the glass and the other of which touches the most backward point of the glass.

Another product having such high and wide relative to front-to-rear dimensional relationship is shown in FIG. 15. It is a furniture cabinet door, with a glass window in it. Although the door without the window, might not be considered fragile, it is desirable it not be damaged in packaging or shipping. The present invention avoids risk of damage that could occur on the bottom edge if the door were resting on that edge. So referring to FIG. 15, the pad 71 of corrugated fiberboard has top, bottom, left and right edges 72, 73, 74 and 76, respectively. Each of these edges has a notch in it. The cabinet door 77 is suspended on the pad by stretch wrapping stretch wrap film 78 from top to bottom edge notches and side to side edge notches as shown. The wrapping in the front envelops the door and pad at the front, and crosses in the front and back in whatever is found most convenient for the wrapping personnel or wrapping machinery used. Since a single continuous length of film 78 can be used in this example as in the above-described examples, portions of the wrap can be at angles between notches as at 78A in front or in back or both, whatever is convenient and sufficient to hold the door snugly against the pad and within the perimeter of the pad. In any case, the entire perimeter of the door is within the entire perimeter of the support pad, even considering the notch contour as part of the perimeter of the pad. Pad and wrapping technique can be tailored to the particular product to be suspended. In any case, the weight of the product is not transmitted directly from a portion of the product to any portion of the container in which it is shipped. The product is suspended on the pad, and the weight is transmitted through the pad to the container, thus protecting the product from damage. Of course the window 79 in the door is amply protected.

The pad for the package of FIG. 15, with the single notch in each edge, results in a sort of clover shaped pad. Multiple side edge notches and top and bottom edge notches can be provided if desire for best product suspension, depending on the nature of the product packaged.

While the invention has been illustrated and described in detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character, it being understood that only the preferred embodiment has been shown and described and that all changes and modifications that come within the spirit of the invention are desired to be protected. It should be understood that while the use of the word preferable, preferably or preferred in the description above indicates that the feature so described may be more desirable, if nonetheless may not be necessary and embodiments lacking the same may be contemplated as within the scope of the invention, that scope being defined by the claims that follow. 

1. Product packaging apparatus comprising: a support having a front face and a rear face and having top and bottom edges and left and right side edges; the support having at least one recess in the bottom edge and at least one recess in the top edge; the support having forwardly projecting extensions at said side edges thereby providing forwardly projecting panels for resistance of said support to bending about axes parallel to a line containing said bottom edge; and wrapping film received in said recesses and stretched around said support between said recesses for enveloping a portion of the product to be packaged and a portion of the support and for securing the product to the support in a position of the product within the perimeter of the support.
 2. A package comprising: a product to be protected and having a perimeter edge and a front surface and having some exterior corners, the product having dimensions in x-axis and y-axis and z-axis directions, and the maximum x-axis dimension and the maximum y-axis dimension each being greater than the maximum z-axis dimension; a support pad having a perimeter edge, top and bottom edges and left and right side edges and having sufficient vertical column strength from top to bottom to support the product without deforming, the bottom edge of the support pad having at least two points on a straight line for stable mounting of the bottom edge of the support on the bottom of a shipping container, the support pad having means for locating the product on the front face of the support pad, the entire perimeter edge of the product lying within said means for locating and within the perimeter edge of the support pad, the support pad having edge extension panels projecting forward from the pad a distance at least as great as the maximum z-axis dimension of the product; and a stretch wrapping film wrapped around the support and the product and securing the product to the support pad to prevent movement of the product relative to the support pad. 